Novell SuSE Linux Professional 9.2 Upgrade [Strong Encryption 128 Bit] 00662644457260 ユーザーズマニュアル
製品コード
00662644457260
16
TV
,
,
V
ideo,
Radio,
and
W
ebcam
16.5.1
Operation
Connect your camera to the USB port of your computer before starting gqcam.
Then run gqcam. The current picture of your webcam is automatically shown in
the upper part of the application window. The lower part has sliders for adjust-
ing the brightness, white balance, contrast, tint, and color saturation according
to your liking. The brightness is automatically preset. This feature can be set in
‘General’ in ‘File’ ➝ ‘Preferences’. ‘Filters’ features false color correction switches
because some cameras swap the red and blue channels in transmission.
Then run gqcam. The current picture of your webcam is automatically shown in
the upper part of the application window. The lower part has sliders for adjust-
ing the brightness, white balance, contrast, tint, and color saturation according
to your liking. The brightness is automatically preset. This feature can be set in
‘General’ in ‘File’ ➝ ‘Preferences’. ‘Filters’ features false color correction switches
because some cameras swap the red and blue channels in transmission.
If you operate more than one webcam, use ‘File’ ➝ ‘Open New Camera’ to
switch to another camera. Select the new device from the dialog that opens. The
first camera is attached to the device
switch to another camera. Select the new device from the dialog that opens. The
first camera is attached to the device
/dev/video0
, the second is attached to
/dev/video1
, and so on.
16.5.2
Snapshots
To take a snapshot with a camera, click ‘Snap Picture’. Select a file name and pic-
ture format in the dialog that opens. Create a picture series with ‘Camera’ ➝ ‘Set
Timer. . . ’. Set the capturing frequency in seconds or minutes along with the prop-
erties of the images in ‘Set image information’. An optional script to run after ev-
ery capture event can be chosen with ‘Run command after snap:’. This could, for
example, be used to upload the captured image onto an FTP server.
ture format in the dialog that opens. Create a picture series with ‘Camera’ ➝ ‘Set
Timer. . . ’. Set the capturing frequency in seconds or minutes along with the prop-
erties of the images in ‘Set image information’. An optional script to run after ev-
ery capture event can be chosen with ‘Run command after snap:’. This could, for
example, be used to upload the captured image onto an FTP server.
16.5.3
Command Line
gqcam can also be run without its graphical user interface. This may be interest-
ing, for instance, for automatic surveillance controlled by a cron job. This requires
that all the necessary settings be passed to the application as parameters. Run-
ning
ing, for instance, for automatic surveillance controlled by a cron job. This requires
that all the necessary settings be passed to the application as parameters. Run-
ning
gqcam -t JPEG -s -d webcam.jpg
saves the current image captured by
the camera with the file name
webcam.jpg
. The option
-t
defines the file for-
mat. Possible values are JPEG, PNG, and PPM. The command line switch
-s
ac-
tivates the color correction. The file name for saving is passed with the option
-d
.
If more than one webcam is operated, the name of the device must be passed. If
no device is given, the default device
no device is given, the default device
/dev/video0
is used. To capture an image
from the second camera, the option
-v /dev/video1
must be added. List all
options with
gqcam --help
.
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SUSE LINUX